text: In 1938, Goodeve and Kitchener demonstrated the “photosensitization” of  TiO—e.g., as evidenced by the fading of paints incorporating it as a pigment. In 1969, Kinney and Ivanuski suggested that a variety of metal oxides, including TiO, may catalyze the oxidation of dissolved organic materials (phenol, benzoic acid, acetic acid, sodium stearate, and sucrose) under illumination by sunlamps. Additional work by Carey et al. suggested that TiO may be useful for the photodechlorination of PCBs.